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BOSTON MARATHON 2025

Natalia Fronduto

Bib: 15356•F

MA

0:00
0:00
/ mi
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Overall
#0 / 28404
Gender (Female)
#0 / 12228
Division (F18-39)
#0 / 5469
Race Day Weather
50°/40°F
broken clouds

⏱️ Race Timeline

Course Elevation
7–469 ft
≈
×2stacked redwood trees
•▲ 890 ft climb · ▼ 1342 ft descent
Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
5K· 3.11 mi
7:57/mi
24:43
↑ 97↓ 3451.5%
10K· 6.21 mi
8:01/mi
49:37
↑ 79↓ 1380.4%
15K· 9.32 mi
8:33/mi
1:16:10
↑ 67↓ 78
20K· 12.43 mi
9:23/mi
1:45:19
↑ 106↓ 860.1%
Half· 13.11 mi
9:05/mi
1:51:31
↑ 19↓ 370.5%
25K· 15.53 mi
9:29/mi
2:14:30
↑ 66↓ 880.2%
30K· 18.64 mi
9:54/mi
2:45:15
↑ 181↓ 1480.2%
20M
11:34/mi
3:00:58
↑ 64↓ 500.2%
21M
11:34/mi
3:12:32
↑ 106↓ 241.6%
35K· 21.75 mi
11:03/mi
3:20:48
↑ 17↓ 861.7%
23M
11:31/mi
3:35:13
↑ 23↓ 630.6%
24M
10:21/mi
3:45:34
↓ 821.3%
40K· 24.85 mi
11:23/mi
3:55:18
↓ 200.3%
25.2M
12:43/mi
3:59:41
↑ 13↓ 160.2%
Finish· 26.22 mi
10:10/mi
4:10:03
↑ 22↓ 21

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:51:31
Pace8:30 /mi
2nd Half
Distance13.11 mi
Time2:18:32
Pace10:34 /mi
📊Positive Split: 24.2% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:56:4724:437:5724:43
7:57
-
10K
6.21 mi11:21:4149:377:5924:54
8:01
+0:04
15K
9.32 mi11:48:141:16:108:1026:33
8:33
+0:32
20K
12.43 mi12:17:231:45:198:2829:09
9:23
+0:50
Half
13.11 mi12:23:351:51:318:306:12
9:05
-0:18
25K
15.53 mi12:46:342:14:308:3922:59
9:29
+0:24
30K
18.64 mi13:17:192:45:158:5230:45
9:54
+0:25
20M
20.00 mi13:33:023:00:589:0315:43
11:34
+1:40
21M
21.00 mi13:44:363:12:329:1011:34
11:34
0:00
35K
21.75 mi13:52:523:20:489:148:16
11:03
-0:31
23M
23.00 mi14:07:173:35:139:2114:25
11:31
+0:28
24M
24.00 mi14:17:383:45:349:2410:21
10:21
-1:10
40K
24.85 mi14:27:223:55:189:289:44
11:23
+1:02
25.2M
25.20 mi14:31:453:59:419:314:23
12:43
+1:20
Finish
26.22 mi14:42:074:10:039:3310:22
10:10
-2:33

Checkpoints & Pacing

📈Pace Line

Pace Progression

Track your pace changes throughout the race. Dot colors mark your quickest to easiest segments, relative to your own pace.

Fastest Pace

7:57 /mi

Average Pace

9:33 /mi

Slowest Pace

12:43 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:51:31

45% of race

Time at Steady Pace

1:14:27

30% of race

Time at Slower Pace

1:04:05

26% of race

Average Pace: 9:32 /mi

Loading chart...
Faster pace (< avg)
Steady pace (≈ avg)
Slower pace (> avg)

🎨Heatmap

Pace Heatmap

Where you sped up and eased off relative to your own pace across the race. Colors are relative to your own range, not to other runners.

Loading...
0mi6.6mi13.1mi19.7mi26.2mi
Pace:
Faster
Steady
Slower

Click or hover over segments to see details

✨Sparklines

Checkpoint Splits with Pace Trends

Overall Pace Trend

CheckpointDistanceTime of DayTimeAvg PaceSegmentPaceTrendRank
5K
3.11 mi10:56:4724:437:5724:43
7:57
#16272
10K
6.21 mi11:21:4149:377:5924:54
8:01
#16396
15K
9.32 mi11:48:141:16:108:1026:33
8:33
#17582
20K
12.43 mi12:17:231:45:198:2829:09
9:23
#19116
Half
13.11 mi12:23:351:51:318:306:12
9:05
#19306
25K
15.53 mi12:46:342:14:308:3922:59
9:29
#19825
30K
18.64 mi13:17:192:45:158:5230:45
9:54
#20210
20M
20.00 mi13:33:023:00:589:0315:43
11:34
#20785
21M
21.00 mi13:44:363:12:329:1011:34
11:34
#20970
35K
21.75 mi13:52:523:20:489:148:16
11:03
#21175
23M
23.00 mi14:07:173:35:139:2114:25
11:31
#21460
24M
24.00 mi14:17:383:45:349:2410:21
10:21
#21508
40K
24.85 mi14:27:223:55:189:289:44
11:23
#21627
25.2M
25.20 mi14:31:453:59:419:314:23
12:43
#21698
Finish
26.22 mi14:42:074:10:039:3310:22
10:10
#21750
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi162725317531719619(Top 69%)7232(Top 59%)7232(Top 132%)
10K6.21 mi3.10 mi16396-1245383-665383-6616620(Top 59%)5500(Top 45%)5500(Top 101%)
15K9.32 mi3.11 mi17582-11866067-6846067-68419619(Top 69%)7232(Top 59%)7232(Top 132%)
20K12.43 mi3.11 mi19116-15346968-9016968-90122522(Top 79%)8877(Top 73%)8877(Top 162%)
Half13.11 mi0.68 mi19306-1907086-1187086-11822201(Top 78%)8718(Top 71%)8718(Top 159%)
25K15.53 mi2.42 mi19825-5197385-2997385-29921793(Top 77%)8540(Top 70%)8540(Top 156%)
30K18.64 mi3.11 mi20210-3857644-2597644-25921299(Top 75%)8396(Top 69%)8396(Top 154%)
20M20.00 mi1.36 mi20785-5757988-3447988-34424662(Top 87%)10296(Top 84%)10296(Top 188%)
21M21.00 mi1.00 mi20970-1858105-1178105-11722753(Top 80%)9369(Top 77%)9369(Top 171%)
35K21.75 mi0.75 mi21175-2058231-1268231-12624321(Top 86%)10231(Top 84%)10231(Top 187%)
23M23.00 mi1.25 mi21460-2858408-1778408-17724291(Top 86%)10239(Top 84%)10239(Top 187%)
24M24.00 mi1.00 mi21508-488454-468454-4622408(Top 79%)9344(Top 76%)9344(Top 171%)
40K24.85 mi0.85 mi21627-1198551-978551-9723938(Top 84%)10136(Top 83%)10136(Top 185%)
25.2M25.20 mi0.35 mi21698-718607-568607-5624607(Top 87%)10468(Top 86%)10468(Top 191%)
Finish26.22 mi1.02 mi21750-528642-358642-3523454(Top 83%)9901(Top 81%)9901(Top 181%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 69%
×21story building
+97ft-345ft

Overall

19619

Females

7232

F18-39

7232

5K→10K

3.1 - 6.2 mi

Top 59%
×5story building
+79ft-138ft

Overall

16620

Females

5500

F18-39

5500

10K→15K

6.2 - 9.3 mi

Top 69%
×3story building
+67ft-78ft

Overall

19619

Females

7232

F18-39

7232

15K→20K

9.3 - 12.4 mi

Top 79%
×5story building
+106ft-86ft

Overall

22522

Females

8877

F18-39

8877

20K→Half

12.4 - 13.1 mi

Top 78%
×2story building
+19ft-37ft

Overall

22201

Females

8718

F18-39

8718

Half→25K

13.1 - 15.5 mi

Top 77%
×4story building
+66ft-88ft

Overall

21793

Females

8540

F18-39

8540

25K→30K

15.5 - 18.6 mi

Top 75%
×9story building
+181ft-148ft

Overall

21299

Females

8396

F18-39

8396

30K→20M

18.6 - 20.0 mi

Top 87%
×5story building
+64ft-50ft

Overall

24662

Females

10296

F18-39

10296

20M→21M

20.0 - 21.0 mi

Top 80%
×8story building
+106ft-24ft

Overall

22753

Females

9369

F18-39

9369

21M→35K

21.0 - 21.8 mi

Top 86%
×7story building
+17ft-86ft

Overall

24321

Females

10231

F18-39

10231

35K→23M

21.8 - 23.0 mi

Top 86%
×5story building
+23ft-63ft

Overall

24291

Females

10239

F18-39

10239

23M→24M

23.0 - 24.0 mi

Top 79%
×6story building
+12ft-82ft

Overall

22408

Females

9344

F18-39

9344

24M→40K

24.0 - 24.9 mi

Top 84%
×1story
+6ft-20ft

Overall

23938

Females

10136

F18-39

10136

40K→25.2M

24.9 - 25.2 mi

Top 87%
×1story
+13ft-16ft

Overall

24607

Females

10468

F18-39

10468

25.2M→Finish

25.2 - 26.2 mi

Top 83%
×2story building
+22ft-21ft

Overall

23454

Females

9901

F18-39

9901

Passing Analysis

Category:
Athletes Passed
702
Passed By
6180
Net Change
-5478
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#16272
5K → 10K244368-124#16272#16396
10K → 15K361222-1186#16396#17582
15K → 20K161550-1534#17582#19116
20K → Half8198-190#19116#19306
Half → 25K54573-519#19306#19825
25K → 30K121506-385#19825#20210
30K → 20M23598-575#20210#20785
20M → 21M43228-185#20785#20970
21M → 35K21226-205#20970#21175
35K → 23M35320-285#21175#21460
23M → 24M4290-48#21460#21508
24M → 40K24143-119#21508#21627
40K → 25.2M879-71#21627#21698
25.2M → Finish2779-52#21698#21750
TOTALS7026180-5478
📊

Passing Visuals

Category:
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🔄Passing Circle

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🌊Position Flow

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🏃Race Lanes

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Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing